Answer: Regan spoke about the tagline crash of American astronauts.
Explanation:
Regan chose to talk about the topic for a reason because as President, it was his moral, social and political responsibility. The demolition of the Challanger caused the deaths of all seven crew members, a national tragedy, which is still celebrated today by laying a wreath on the plaque to these people every January twenty-eighth of the year. The topic as such is appropriate for everyone, as it is an essential event in the US and NASA history. The President's speech was broadcast live from the White House on radio and television frequencies.
